<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <meta name="description" content="Use HeadingPitchRoll">
    <meta name="cesium-sandcastle-labels" content="Tutorials">
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script type="text/javascript" src="../../../Build/CesiumUnminified/Cesium.js" nomodule></script>
    <script type="module" src="../load-cesium-es6.js"></script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
        @import url(../templates/bucket.css);
    </style>
    <div id="cesiumContainer" class="fullSize"></div>
    <div id="loadingOverlay">
        <h1>Loading...</h1>
    </div>
    <div id="toolbar">
        <table class="infoPanel">
            <tbody>
                <tr>
                    <td>Click on the 3D window then use the keyboard to change settings.</td>
                </tr>
                <tr>
                    <td>Heading: <span id="heading"></span>°</td>
                </tr>
                <tr>
                    <td>← to left/→ to right</td>
                </tr>
                <tr>
                    <td>Pitch: <span id="pitch"></span>°</td>
                </tr>
                <tr>
                    <td>↑ to up/↓ to down</td>
                </tr>
                <tr>
                    <td>roll: <span id="roll"></span>°</td>
                </tr>
                <tr>
                    <td>← + ⇧ left/→ + ⇧ right</td>
                </tr>
                <tr>
                    <td>Speed: <span id="speed"></span>m/s</td>
                </tr>
                <tr>
                    <td>↑ + ⇧ to speed up/↓ + ⇧ to speed down</td>
                </tr>
                <tr>
                    <td>following aircraft
                        <input id="fromBehind" type="checkbox">
                    </td>
                </tr>

            </tbody>
        </table>
    </div>
    <script id="cesium_sandcastle_script">
function startup(Cesium) {
    'use strict';
//Sandcastle_Begin
var viewer = new Cesium.Viewer('cesiumContainer', {
    shouldAnimate : true
});

var canvas = viewer.canvas;
canvas.setAttribute('tabindex', '0'); // needed to put focus on the canvas
canvas.addEventListener('click', function() {
    canvas.focus();
});
canvas.focus();

var scene = viewer.scene;

var pathPosition = new Cesium.SampledPositionProperty();
var entityPath = viewer.entities.add({
    position : pathPosition,
    name : 'path',
    path : {
        show : true,
        leadTime : 0,
        trailTime : 60,
        width : 10,
        resolution : 1,
        material : new Cesium.PolylineGlowMaterialProperty({
            glowPower : 0.3,
            taperPower : 0.3,
            color : Cesium.Color.PALEGOLDENROD
        })
    }
});

var camera = viewer.camera;
var controller = scene.screenSpaceCameraController;
var r = 0;
var center = new Cesium.Cartesian3();

var hpRoll = new Cesium.HeadingPitchRoll();
var hpRange = new Cesium.HeadingPitchRange();
var speed = 10;
var deltaRadians = Cesium.Math.toRadians(3.0);

var position = Cesium.Cartesian3.fromDegrees(-123.0744619, 44.0503706, 5000.0);
var speedVector = new Cesium.Cartesian3();
var fixedFrameTransform = Cesium.Transforms.localFrameToFixedFrameGenerator('north', 'west');

var planePrimitive = scene.primitives.add(Cesium.Model.fromGltf({
    url : '../../SampleData/models/CesiumAir/Cesium_Air.glb',
    modelMatrix : Cesium.Transforms.headingPitchRollToFixedFrame(position, hpRoll, Cesium.Ellipsoid.WGS84, fixedFrameTransform),
    minimumPixelSize : 128
}));

planePrimitive.readyPromise.then(function(model) {
    // Play and loop all animations at half-speed
    model.activeAnimations.addAll({
        multiplier : 0.5,
        loop : Cesium.ModelAnimationLoop.REPEAT
    });

    // Zoom to model
    r = 2.0 * Math.max(model.boundingSphere.radius, camera.frustum.near);
    controller.minimumZoomDistance = r * 0.5;
    Cesium.Matrix4.multiplyByPoint(model.modelMatrix, model.boundingSphere.center, center);
    var heading = Cesium.Math.toRadians(230.0);
    var pitch = Cesium.Math.toRadians(-20.0);
    hpRange.heading = heading;
    hpRange.pitch = pitch;
    hpRange.range = r * 50.0;
    camera.lookAt(center, hpRange);
});

document.addEventListener('keydown', function(e) {
    switch (e.keyCode) {
        case 40:
            if (e.shiftKey) {
                // speed down
                speed = Math.max(--speed, 1);
            } else {
                // pitch down
                hpRoll.pitch -= deltaRadians;
                if (hpRoll.pitch < -Cesium.Math.TWO_PI) {
                    hpRoll.pitch += Cesium.Math.TWO_PI;
                }
            }
            break;
        case 38:
            if (e.shiftKey) {
                // speed up
                speed = Math.min(++speed, 100);
            } else {
                // pitch up
                hpRoll.pitch += deltaRadians;
                if (hpRoll.pitch > Cesium.Math.TWO_PI) {
                    hpRoll.pitch -= Cesium.Math.TWO_PI;
                }
            }
            break;
        case 39:
            if (e.shiftKey) {
                // roll right
                hpRoll.roll += deltaRadians;
                if (hpRoll.roll > Cesium.Math.TWO_PI) {
                    hpRoll.roll -= Cesium.Math.TWO_PI;
                }
            } else {
                // turn right
                hpRoll.heading += deltaRadians;
                if (hpRoll.heading > Cesium.Math.TWO_PI) {
                    hpRoll.heading -= Cesium.Math.TWO_PI;
                }
            }
            break;
        case 37:
            if (e.shiftKey) {
                // roll left until
                hpRoll.roll -= deltaRadians;
                if (hpRoll.roll < 0.0) {
                    hpRoll.roll += Cesium.Math.TWO_PI;
                }
            } else {
                // turn left
                hpRoll.heading -= deltaRadians;
                if (hpRoll.heading < 0.0) {
                    hpRoll.heading += Cesium.Math.TWO_PI;
                }
            }
            break;
        default:
    }
});

var headingSpan = document.getElementById('heading');
var pitchSpan = document.getElementById('pitch');
var rollSpan = document.getElementById('roll');
var speedSpan = document.getElementById('speed');
var fromBehind = document.getElementById('fromBehind');

viewer.scene.preUpdate.addEventListener(function(scene, time) {
    speedVector = Cesium.Cartesian3.multiplyByScalar(Cesium.Cartesian3.UNIT_X, speed / 10, speedVector);
    position = Cesium.Matrix4.multiplyByPoint(planePrimitive.modelMatrix, speedVector, position);
    pathPosition.addSample(Cesium.JulianDate.now(), position);
    Cesium.Transforms.headingPitchRollToFixedFrame(position, hpRoll, Cesium.Ellipsoid.WGS84, fixedFrameTransform, planePrimitive.modelMatrix);

    if (fromBehind.checked) {
        // Zoom to model
        Cesium.Matrix4.multiplyByPoint(planePrimitive.modelMatrix, planePrimitive.boundingSphere.center, center);
        hpRange.heading = hpRoll.heading;
        hpRange.pitch = hpRoll.pitch;
        camera.lookAt(center, hpRange);
    }
});

viewer.scene.preRender.addEventListener(function(scene, time) {
    headingSpan.innerHTML = Cesium.Math.toDegrees(hpRoll.heading).toFixed(1);
    pitchSpan.innerHTML = Cesium.Math.toDegrees(hpRoll.pitch).toFixed(1);
    rollSpan.innerHTML = Cesium.Math.toDegrees(hpRoll.roll).toFixed(1);
    speedSpan.innerHTML = speed.toFixed(1);
});
//Sandcastle_End
    Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
    window.startupCalled = true;
    startup(Cesium);
}
</script>
</body>
</html>
